First my setup: tial BOV, Intercooler, ms2 stock, fuel pump(about 3 yrs old), FPR (1yr old), and stock boost.
I am looking for some input on a problem I am having. Ever since I moved from NC to Indy my fuel pressure at been lower (45PSI to now 35PSI tapering down to 30PSI). Once in a while I get the 45psi like I useto but by the time I look back its down to 35-30psi. I left my fuel pressure regulator (FPR) open to the atm and let tune my MS2 for the difference but now at 30PSI I am getting the dreaded misfire at all rpm (even idle). I tried reconnecting the hose from the FPR to the intake manifold but that just drops the pressure even more. I tried my spare FPR regulator and I get the same results.
Before I moved I did install my IC and BOV and only got to drive it twice. It was lean up top (which it should) but in the lower rpms no misfires.
Things I tried so far:
1. Change plug gap from .41 to .36
2. swapped FPR
3. check timing with timing light
4. uploaded my last known good tune (MS2)
Im pretty sure this is a Fuel Problem but wanted to get input as to other things to check before I run and buy a Walbaro and/or adjustable FPR. I am only running 7PSI and right now only shooting for 10PSI which the stock system should be able to handle. One thing to add is that the car was not started since I moved (2 months). I
Thanks guys!